diff --git a/app/src/main/java/com/stevesoltys/seedvault/metadata/Metadata.kt b/app/src/main/java/com/stevesoltys/seedvault/metadata/Metadata.kt
index 01a10265..6c13319c 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/metadata/Metadata.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/metadata/Metadata.kt
@@ -20,7 +20,12 @@ data class BackupMetadata(
     internal val deviceName: String = "${Build.MANUFACTURER} ${Build.MODEL}",
     internal var d2dBackup: Boolean = false,
     internal val packageMetadataMap: PackageMetadataMap = PackageMetadataMap(),
-)
+) {
+    val size: Long?
+        get() = packageMetadataMap.values.sumOf { m ->
+            (m.size ?: 0L) + (m.splits?.sumOf { it.size ?: 0L } ?: 0L)
+        }
+}
 
 internal const val JSON_METADATA = "@meta@"
 internal const val JSON_METADATA_VERSION = "version"
@@ -89,6 +94,7 @@ data class PackageMetadata(
 
 data class ApkSplit(
     val name: String,
+    val size: Long?,
     val sha256: String,
     // There's also a revisionCode, but it doesn't seem to be used just yet
 )
diff --git a/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataManager.kt b/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataManager.kt
index 55b29732..ea2d8d17 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataManager.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataManager.kt
@@ -58,6 +58,8 @@ internal class MetadataManager(
             return field
         }
 
+    val backupSize: Long? get() = metadata.size
+
     /**
      * Call this when initializing a new device.
      *
diff --git a/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataReader.kt b/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataReader.kt
index fe1920b2..1d7bd4ad 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataReader.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataReader.kt
@@ -169,6 +169,9 @@ internal class MetadataReaderImpl(private val crypto: Crypto) : MetadataReader {
             val jsonApkSplit = jsonSplits.getJSONObject(i)
             val apkSplit = ApkSplit(
                 name = jsonApkSplit.getString(JSON_PACKAGE_SPLIT_NAME),
+                size = jsonApkSplit.optLong(JSON_PACKAGE_SIZE, -1L).let {
+                    if (it < 0L) null else it
+                },
                 sha256 = jsonApkSplit.getString(JSON_PACKAGE_SHA256)
             )
             splits.add(apkSplit)
diff --git a/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataWriter.kt b/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataWriter.kt
index ef9473ba..d1aba586 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataWriter.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/metadata/MetadataWriter.kt
@@ -61,6 +61,7 @@ internal class MetadataWriterImpl(private val crypto: Crypto) : MetadataWriter {
                     put(JSON_PACKAGE_SPLITS, JSONArray().apply {
                         for (split in splits) put(JSONObject().apply {
                             put(JSON_PACKAGE_SPLIT_NAME, split.name)
+                            if (split.size != null) put(JSON_PACKAGE_SIZE, split.size)
                             put(JSON_PACKAGE_SHA256, split.sha256)
                         })
                     })
diff --git a/app/src/main/java/com/stevesoltys/seedvault/restore/RestorableBackup.kt b/app/src/main/java/com/stevesoltys/seedvault/restore/RestorableBackup.kt
index 2c3abb3c..642533b3 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/restore/RestorableBackup.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/restore/RestorableBackup.kt
@@ -20,6 +20,9 @@ data class RestorableBackup(val backupMetadata: BackupMetadata) {
     val time: Long
         get() = backupMetadata.time
 
+    val size: Long?
+        get() = backupMetadata.size
+
     val deviceName: String
         get() = backupMetadata.deviceName
 
diff --git a/app/src/main/java/com/stevesoltys/seedvault/restore/RestoreSetAdapter.kt b/app/src/main/java/com/stevesoltys/seedvault/restore/RestoreSetAdapter.kt
index f55ccbe3..8e203b0a 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/restore/RestoreSetAdapter.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/restore/RestoreSetAdapter.kt
@@ -3,8 +3,11 @@ package com.stevesoltys.seedvault.restore
 import android.text.format.DateUtils.FORMAT_ABBREV_RELATIVE
 import android.text.format.DateUtils.HOUR_IN_MILLIS
 import android.text.format.DateUtils.getRelativeTimeSpanString
+import android.text.format.Formatter
 import android.view.LayoutInflater
 import android.view.View
+import android.view.View.GONE
+import android.view.View.VISIBLE
 import android.view.ViewGroup
 import android.widget.TextView
 import androidx.recyclerview.widget.RecyclerView.Adapter
@@ -33,6 +36,7 @@ internal class RestoreSetAdapter(
 
         private val titleView = v.requireViewById<TextView>(R.id.titleView)
         private val subtitleView = v.requireViewById<TextView>(R.id.subtitleView)
+        private val sizeView = v.requireViewById<TextView>(R.id.sizeView)
 
         internal fun bind(item: RestorableBackup) {
             v.setOnClickListener { listener.onRestorableBackupClicked(item) }
@@ -42,6 +46,16 @@ internal class RestoreSetAdapter(
             val setup = getRelativeTime(item.token)
             subtitleView.text =
                 v.context.getString(R.string.restore_restore_set_times, lastBackup, setup)
+            val size = item.size
+            if (size == null) {
+                sizeView.visibility = GONE
+            } else {
+                sizeView.text = v.context.getString(
+                    R.string.restore_restore_set_size,
+                    Formatter.formatShortFileSize(v.context, size),
+                )
+                sizeView.visibility = VISIBLE
+            }
         }
 
         private fun getRelativeTime(time: Long): CharSequence {
diff --git a/app/src/main/java/com/stevesoltys/seedvault/worker/ApkBackup.kt b/app/src/main/java/com/stevesoltys/seedvault/worker/ApkBackup.kt
index 991039ad..786975c7 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/worker/ApkBackup.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/worker/ApkBackup.kt
@@ -194,13 +194,16 @@ internal class ApkBackup(
         // that we exceed the maximum file name length, so we use the hash instead.
         // The downside is that we need to read the file two times.
         val messageDigest = MessageDigest.getInstance("SHA-256")
-        getApkInputStream(sourceDir).use { inputStream ->
+        val size = getApkInputStream(sourceDir).use { inputStream ->
             val buffer = ByteArray(DEFAULT_BUFFER_SIZE)
+            var readCount = 0
             var bytes = inputStream.read(buffer)
             while (bytes >= 0) {
+                readCount += bytes
                 messageDigest.update(buffer, 0, bytes)
                 bytes = inputStream.read(buffer)
             }
+            readCount
         }
         val sha256 = messageDigest.digest().encodeBase64()
         val name = crypto.getNameForApk(metadataManager.salt, packageName, splitName)
@@ -210,7 +213,7 @@ internal class ApkBackup(
                 inputStream.copyTo(outputStream)
             }
         }
-        return ApkSplit(splitName, sha256)
+        return ApkSplit(splitName, size.toLong(), sha256)
     }
 
 }
diff --git a/app/src/main/res/layout/list_item_restore_set.xml b/app/src/main/res/layout/list_item_restore_set.xml
index 748ec0e6..b430f77e 100644
--- a/app/src/main/res/layout/list_item_restore_set.xml
+++ b/app/src/main/res/layout/list_item_restore_set.xml
@@ -33,14 +33,25 @@
 
     <TextView
         android:id="@+id/subtitleView"
-        android:layout_width="wrap_content"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:layout_marginTop="8dp"
-        android:layout_marginBottom="16dp"
         android:textColor="?android:attr/textColorTertiary"
-        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="@+id/titleView"
         app:layout_constraintTop_toBottomOf="@+id/titleView"
-        tools:text="Yesterday, 8:25 AM" />
+        tools:text="@string/restore_restore_set_times" />
+
+    <TextView
+        android:id="@+id/sizeView"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        android:layout_marginBottom="16dp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="@+id/titleView"
+        app:layout_constraintTop_toBottomOf="@+id/subtitleView"
+        tools:text="Size: 5 GB" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 5fa45261..8b02e9d8 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -195,6 +195,7 @@
     <string name="restore_title">Restore from backup</string>
     <string name="restore_choose_restore_set">Choose a backup to restore</string>
     <string name="restore_restore_set_times">Last backup %1$s · First %2$s.</string>
+    <string name="restore_restore_set_size">Size: <xliff:g example="1 GB" id="size">%1$s</xliff:g></string>
     <string name="restore_skip">Don\'t restore</string>
     <string name="restore_skip_apps">Skip restoring apps</string>
     <string name="restore_invalid_location_title">No backups found</string>
diff --git a/app/src/test/java/com/stevesoltys/seedvault/metadata/MetadataWriterDecoderTest.kt b/app/src/test/java/com/stevesoltys/seedvault/metadata/MetadataWriterDecoderTest.kt
index 32d3224c..0c3da522 100644
--- a/app/src/test/java/com/stevesoltys/seedvault/metadata/MetadataWriterDecoderTest.kt
+++ b/app/src/test/java/com/stevesoltys/seedvault/metadata/MetadataWriterDecoderTest.kt
@@ -61,9 +61,13 @@ internal class MetadataWriterDecoderTest {
                     version = Random.nextLong(),
                     installer = getRandomString(),
                     splits = listOf(
-                        ApkSplit(getRandomString(), getRandomString()),
-                        ApkSplit(getRandomString(), getRandomString()),
-                        ApkSplit(getRandomString(), getRandomString())
+                        ApkSplit(getRandomString(), null, getRandomString()),
+                        ApkSplit(getRandomString(), 0L, getRandomString()),
+                        ApkSplit(
+                            name = getRandomString(),
+                            size = Random.nextLong(0, Long.MAX_VALUE),
+                            sha256 = getRandomString(),
+                        ),
                     ),
                     sha256 = getRandomString(),
                     signatures = listOf(getRandomString(), getRandomString())
diff --git a/app/src/test/java/com/stevesoltys/seedvault/restore/install/ApkBackupRestoreTest.kt b/app/src/test/java/com/stevesoltys/seedvault/restore/install/ApkBackupRestoreTest.kt
index c22c4a38..966e843b 100644
--- a/app/src/test/java/com/stevesoltys/seedvault/restore/install/ApkBackupRestoreTest.kt
+++ b/app/src/test/java/com/stevesoltys/seedvault/restore/install/ApkBackupRestoreTest.kt
@@ -76,7 +76,7 @@ internal class ApkBackupRestoreTest : TransportTest() {
         installer = getRandomString(),
         sha256 = "eHx5jjmlvBkQNVuubQzYejay4Q_QICqD47trAF2oNHI",
         signatures = listOf("AwIB"),
-        splits = listOf(ApkSplit(splitName, splitSha256))
+        splits = listOf(ApkSplit(splitName, Random.nextLong(), splitSha256))
     )
     private val packageMetadataMap: PackageMetadataMap = hashMapOf(packageName to packageMetadata)
     private val installerName = packageMetadata.installer
diff --git a/app/src/test/java/com/stevesoltys/seedvault/restore/install/ApkRestoreTest.kt b/app/src/test/java/com/stevesoltys/seedvault/restore/install/ApkRestoreTest.kt
index e6017adc..034038a8 100644
--- a/app/src/test/java/com/stevesoltys/seedvault/restore/install/ApkRestoreTest.kt
+++ b/app/src/test/java/com/stevesoltys/seedvault/restore/install/ApkRestoreTest.kt
@@ -269,8 +269,8 @@ internal class ApkRestoreTest : TransportTest() {
         val split2Name = getRandomString()
         packageMetadataMap[packageName] = packageMetadataMap[packageName]!!.copy(
             splits = listOf(
-                ApkSplit(split1Name, getRandomBase64()),
-                ApkSplit(split2Name, getRandomBase64())
+                ApkSplit(split1Name, Random.nextLong(), getRandomBase64()),
+                ApkSplit(split2Name, Random.nextLong(), getRandomBase64())
             )
         )
 
@@ -293,7 +293,7 @@ internal class ApkRestoreTest : TransportTest() {
         // add one APK split to metadata
         val splitName = getRandomString()
         packageMetadataMap[packageName] = packageMetadataMap[packageName]!!.copy(
-            splits = listOf(ApkSplit(splitName, getRandomBase64(23)))
+            splits = listOf(ApkSplit(splitName, Random.nextLong(), getRandomBase64(23)))
         )
 
         // cache APK and get icon as well as app name
@@ -318,7 +318,7 @@ internal class ApkRestoreTest : TransportTest() {
             val splitName = getRandomString()
             val sha256 = getRandomBase64(23)
             packageMetadataMap[packageName] = packageMetadataMap[packageName]!!.copy(
-                splits = listOf(ApkSplit(splitName, sha256))
+                splits = listOf(ApkSplit(splitName, Random.nextLong(), sha256))
             )
 
             // cache APK and get icon as well as app name
@@ -343,8 +343,8 @@ internal class ApkRestoreTest : TransportTest() {
         val split2sha256 = "ZqZ1cVH47lXbEncWx-Pc4L6AdLZOIO2lQuXB5GypxB4"
         packageMetadataMap[packageName] = packageMetadataMap[packageName]!!.copy(
             splits = listOf(
-                ApkSplit(split1Name, split1sha256),
-                ApkSplit(split2Name, split2sha256)
+                ApkSplit(split1Name, Random.nextLong(), split1sha256),
+                ApkSplit(split2Name, Random.nextLong(), split2sha256)
             )
         )
 
diff --git a/app/src/test/java/com/stevesoltys/seedvault/worker/ApkBackupTest.kt b/app/src/test/java/com/stevesoltys/seedvault/worker/ApkBackupTest.kt
index c79f007b..2159ff32 100644
--- a/app/src/test/java/com/stevesoltys/seedvault/worker/ApkBackupTest.kt
+++ b/app/src/test/java/com/stevesoltys/seedvault/worker/ApkBackupTest.kt
@@ -208,8 +208,8 @@ internal class ApkBackupTest : BackupTest() {
             version = packageInfo.longVersionCode,
             installer = getRandomString(),
             splits = listOf(
-                ApkSplit(split1Name, split1Sha256),
-                ApkSplit(split2Name, split2Sha256)
+                ApkSplit(split1Name, split1Bytes.size.toLong(), split1Sha256),
+                ApkSplit(split2Name, split2Bytes.size.toLong(), split2Sha256)
             ),
             sha256 = "eHx5jjmlvBkQNVuubQzYejay4Q_QICqD47trAF2oNHI",
             signatures = packageMetadata.signatures